<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>

<body>
    <h1>一级标题</h1>
    <h2>二级标题</h2>
    <h3>三级标题</h3>
    <h4>四级标题</h4>
    <h5>五级标题</h5>
    <h6>六级标题</h6>
    <p>这是段落标签</p>
    <hr>

    <q>这是引用标签</q>
    <b>加粗</b>
    <i>倾斜</i>
    <br>
    <s>删除线</s>
    <u>下划线</u>
    <small>小号文本</small>
    <big>大号文本</big>

</body>

</html>